Ethernet Controller I210-IT Speed drop after 40 secs for 6 secs

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Ethernet Controller I210-IT Speed drop after 40 secs for 6 secs

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Hi, We are using I210-IT( part number: WGI210ITSLJXT ) Ethernet controller on our custom board for 1G speed. We have an issue here, during iperf3 test, we observe that the speed drops and looses connection exactly after 40 seconds. After 6 seconds connection drop, it recovers automatically and 1G speed works fine. This speed drops cycle repeats continously. Please let us know the reason for this issue. Thanks, Nagesh R

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